GMC 97363571 Manifold,Lower Intake (LH)

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Any remaining electrical connectors or vacuum hoses connected to the intake manifold or throttle body should be disconnected.

The new intake manifold should be positioned correctly with the wet sealant and the gaskets in place.

To start with, disconnect the cable from the battery's negative terminal prior to eliminating the intake manifold. Also, drain coolant and remove ignition coil as well as EVAP canister tube. In addition, sever heater hoses; throttle body wiring, and numerous electrical connectors. Moreover, get rid of PCV valve hose; power brake booster hose, and radiator hose. Furthermore, drop water pump intake hose together with drivebelt. And then, release power steering pump bracket nut and bolts. Finally, shift power steering pump bracket forward in order to reach the bolt at front of intake manifold. Therefore, remove intake lower manifold mounting bolts and pry up manifold to break gasket seal. Eventually loosen all connections attaching the intake manifold while ensuring nothing is still attached. For installation purposes: clean mating surfaces and tap thread in bolt holes; apply RTV sealant on front and rear manifolds' mating surfaces plus a thin ring around new intake manifold gaskets' cylinder head side coolant passage holes; place gaskets accordingly while sealant is still wet then set the manifold in position; install bolts eventually following recommended sequence; finally perform remaining tasks in reversed manner fill cooling system again and check for leaks at joints between intake manifolds.

The intake manifold mounting bolts should be loosened incrementally in reverse order until they can be removed by hand.